I wish I could give you some easy answers for your reception problem, but you have a difficult location. You will just have to continue with your antenna experiments to see what works, and in so doing you will learn a lot about OTA reception.
Even if you had your antennas on a tower that was above the trees, you would still have a very strong WICD, channels in different directions, and FM interference to deal with.
A custom channel 41 bandstop filter to make WICD weaker from Tin Lee Electronics would probably cost over $100.
http://www.tinlee.com/MATV-Bandstops.php?active=3
You would have to call them and talk with one of their filter engineers and send your TVFool signal report.
PAR Electronics might be able to make one for less:
http://www.parelectronics.com/single-channel-tv.php
The least expensive filter would be from Jan Jenca in Slovakia. They sell on eBay.
http://www.antenne-komponenty.eu/eng...ct/filtre.html
They also sell combiners, and could make one for Fox on real channel 26 that would allow you to add it to the other channels before splitting.
http://www.antenne-komponenty.eu/eng...zlucovace.html